Sulfur dyes.



Wuhan 1 a transmit WILHELM HERZBERQ, 0F BERLIN-WILMEBSDORF, AND OSWALD SGI-IARFENBEHG, fill BEELIN-SCHNEBERG, GERMANY, ASSIGNORS T0 ACIIEN' GESELLSCHAFT ANILIN FABRIKATIGN, OF BERLIN, GERMANY.

SULFUR DYES.

Specification of Letters Patent.

Patented Dec. Till E 91th No Drawing. Original application filcd February 26. 1912, Serial No. 679,993. Patent No. 1,102,111, dated June 30, 1914. fivided and this application filed March 22. 1913. Serial No. 756,233.

.. or dihyclroperimidone-Z or dihydrothioperimidonc-Q, e. heteronuclearic derivatives of 1.8-naphthylenediamin, and ara-a'minophenol or its derivatives or quinone-chlorimid or its derivatives respectively.

Now in the present invention we claim new sulfur dyes manufactured from indophenols which derive from other lieteronu elearic derivatives of 1.8nziphthylenediamin and from paraamino phenol or its derivatives or quinonechlorimid or its derivatives respectively.

The general structure of the perimidin derivatives underlying the new indophenols serving as parent material for-our present invention is represented by the following general formula:

- N M /W/ in this formula R representing inorganic radical, so that R is an alkyl group or aryl group or aralkyl group or alkaryl group or the like. The new indophenols in question derive therefore for example from methylperimidin.

In manufacturing the new sulfur dyes the new indophenols may be actedupon Wit/hull alkali-polysulfid containing ahigh' or low percentage of sulfur: furthermore a suitable solvent, such as alcohol or water, or a suitable diluent may be added.

parts of a sodium sullid solution containing 22 per cent. of Na ,S are added with 13 parts of sulfur and after dissolving the sulfur by gently heating T0 parts of alcohol are added; into the mass thus obtained 14 parts oi the indopluinol derived from fZXS-dichlor paraaininophenol and methyl-perimidin are introduced whereupon the mass is heated at the reflux condenser during about 6.0 hours. The formation of the dyestufi bring finished it is isolated in the usual manner for instance by distilling: over the alcohol, adding a suitable quantity of water to the mass and intro ducingr a current of air. The new dye thus obtained in the dry state when pulverized forms a black powder practically insoluble in concentrated sulfuric acid and insoluble in alcohol. benzene. iiitroheiizcne, ether and the other usual sol vents. It dissolves in an alkaline hydrosulfite solution to a brownishyelloiv solution and in sodium suh'id to a greensolution. From a dye-bath containing sodium-suliid cotton is dyed without a inordant full dark green tints which possess a good fa stness.

Of course it is obvious that the present in vention is not limited to the foregoing examples or to the details given therein.

It is to be understood that the proportions of the ingredients and the special conditions of reaction may be altered without departing from the spirit of the invention.

Having r I described our invention and the manner in which it may be carried out What we claim is,

1. As new articles of manufacture new sulfur dyes, being sulfur containing deriva tives of the indophenols obtainable from a periinidin compound of the general formula o-ii N NH l in which R means an organic radical, and

i ll Hill I ll) 20 and from 2.6 -diehloro-paroaminophenol,

which new dye is when dried and pulverized a black powder, practically insoluble in concentrated sulfuric acid, alcohol, benzene, nitrobenzene, ether and the other usual sol-l vents, and which new dye is soluble in a so- 25 dium-sulfid solution to a green solution and is soluble in an alkaline hydrosulfite solution to a brownish yellow solution, and this new dye producing on cotton from a both conmining an alkali-sulfid a full dark green 30 possessing a good fastness.

In testnnony whereof we have hereunto set our hands in presence of two subscribing witnesses.

WILHELM HERZBERG. FOSWALD SCHARFENBERG.

Witnesses: I HENRY HAsPnR, WQLDEMAR HAUPT. 

